Agilent 34980A Multifunction Switch/Measure Unit *34980-90005*
Agilent 34980A Multifunction Switch/Measure Unit *34980-90005*
Agilent 34980A Multifunction Switch/Measure Unit *34980-90005*
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3 Features and Functions<br />
Calibration Count<br />
To Change the Security Code<br />
To change the security code, you must first unsecure the instrument, <br />
and then enter a new code. You can change the security code from the<br />
remote interface only. Make sure you have read the security code rules<br />
described on page 155 before attempting to change the security code.<br />
Remote Interface Operation: To change the security code, unsecure the<br />
instrument using the old security code. Then enter the new code as<br />
shown below. <br />
CAL:SECURE:STATE OFF,AT34980<br />
CAL:SECURE:CODE SN123456789<br />
You can query the instrument to determine how many calibrations have<br />
been performed on the entire mainframe, the digital modules, or the<br />
internal DMM (remote interface operation only). Note that your<br />
instrument was calibrated before it left the factory. When you receive <br />
your instrument, be sure to read the various counts to determine the<br />
initial values.<br />
The calibration count is stored in non- volatile memory in the<br />
mainframe, and does not change when power has been off, after a<br />
Factory Reset (*RST command), or after an Instrument Preset<br />
(SYSTem:PRESet command).<br />
The calibration counts increments up to a maximum of 4,294,967,295<br />
after which they roll over to “0”. Since the value increments by one for<br />
each calibration point, a complete calibration may increase the value by<br />
many counts.<br />
The calibration count is also incremented with calibrations of DAC<br />
channels on the 34951A Isolated DAC Module and 34952A <strong>Multifunction</strong><br />
Module.<br />
Remote Interface Operation: CALibration:COUNt?<br />
Unsecure with old code<br />
Enter new code<br />
156 <strong>Agilent</strong> <strong>34980A</strong> Mainframe User’s Guide